217 



Bullmus — continued. 



sej^tonus. . turreted, six smooth convex whirls, opening ovate. . 



small. 

 conulus. . conical, upper part of the whirls channelled, spire 



acute. . very small. 

 clavulus. . whirls flat, strise transverse. . very small. 

 striatulus. . whirls convex, very finely striated. . very small. 

 nanus. . whirls convex, with very small vertical plicae. . werj 



small. 

 Several other shells are placed, doubtfully, under this genus, 



which are hardly distinguishable from turbo, cyclostomus, &c. 



Phasianella. 



turbinoides. . ovate ; variously coloured, whirls smooth. . ~ inch . 



Lymnaea. 



palustris. . oblong, substriated, with rather convex whirls, open- 

 ing ovate. 



Melania. 



costellata. . turreted, subulate, transversely striated, the upper 

 part of the lip channelled within. . 1 inch. 

 ■ lactea. . turreted, thick whirls convex, lower, smooth ; upper 

 striated vertically. . 1 inch. 



marginata. . conical, turreted, striae transverse, distant, w^hirls 

 subcanaliculated in the upper parts, opening bordered. . 

 1 inch. 



hordacea. . turreted, striae transverse ; opening small. . small. 



canalicularis. . turreted, subulate, whirls convex, with fine trans- 

 verse striae, . small. 



corrugata. . turreted, whirls decussated on their upper parts. . 

 f inch. 



semiplicata. . conical, transversely striated, vertically subpli- 

 cated ; opening with a produced sinus. . f inch. 



nitida. . sui)ulate, pointed, whirls smooth and shining. . | inch. 



semistriata. . upper whirls vertically striated ; lower ones smooth 

 . . small. 



cochlear ella. . with small long grooves ; lip produced somewhat 

 like cerithmm. . f inch. 



fragilis. . convex whirls, longitudinal grooves. . very small. 



dubia. . ovato-conical ; ribbed vertically, striae small and trans- 

 verse ; columella truncated. . small. 



Auricula. 



sulcata, . ovato-conical, transversely sulcated ; spire acute ; co- 

 lumella with one plait. . f inch. 



cvata. . ovato-acute, subventricose, smooth ; lip bordered inter- 

 nally ; columella subtriplicated. . ^ inch. 



ringens. . ovato-acute, rather turgid ; transversely striated ; lip 

 bordered with a callous margin ; columella subtriplicated 

 . . very small. 



miliola. . ovato-conical ; smooth, columella with one fold. . very 

 small. 



Ff. 



